Record Details

Effect of preheated mixture on heat transfer characteristics of impinging methane-air premixed flame jet

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Effect of preheated mixture on heat transfer characteristics of impinging methane-air premixed flame jet
 
Creator TAJIK, AR
KUNTIKANA, P
PRABHU, SV
HINDASAGERI, V
 
Subject INDUCED-SWIRL
SURFACE
TEMPERATURE
PLATE
GAS
FLUX
Flame impingement
Nusselt number
Effectiveness
Preheat
 
Description Energy from spent flame or other low grade energy can be used to increase the temperature of the air before mixing with fuel. This would improve the heat transfer characteristics of the impinging flame jet. The studies on impinging flame jets reported in the literature are based on the fuel-air mixture at ambient temperature. In the present work, the inlet air for mixture is heated by an electrical heater. The heat flux distribution is estimated using an inverse heat conduction (IHCP) technique. The Nusselt number (Nu) and effectiveness (eta) distributions are obtained by estimating the adiabatic wall temperature (T-aw) by the analytical-numerical method. A circular burner of 13.5 mm is used for impingement on quartz plate of 3 mm thickness. Reynolds number (Re) varying from 500 to 2000 for the non-dimensional burner tip to impingement plate spacing (Z/d) of 2-6 and stoichiometric condition (phi = 1.0) is considered for varying preheated condition. The effect of equivalence ratio is studied for phi = 0.75 to 1.5 for Re = 1000 and Z/d = 4. By increase in preheat temperature, the stagnation point heat flux increases from 20% to 50% unless the inner premixed zone touches the impingement plate. CFD simulations are carried out in FLUENT software to explain the distribution of heat flux. (C) 2015 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2016-01-14T13:53:44Z
2016-01-14T13:53:44Z
2015
 
Type Article
 
Identifier INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 86,550-562
0017-9310
1879-2189
http://dx.doi.org/10.1016/j.ijheatmasstransfer.2015.03.040
http://dspace.library.iitb.ac.in/jspui/handle/100/17664
 
Language en